We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Correlations between product distribution and feedstock composition in thermal cracking processes for mixed plastic waste
AI summary Read the abstract
Researchers analyzed industrial-scale thermal cracking of complex mixed waste streams — including automotive, cable, and textile waste — and found that olefin monomer recovery correlates strongly with the proportion of aliphatic carbon in the feedstock, offering a predictive framework for plastic-to-chemical recycling.
Thermal conversion can transform the carbon-based waste into valuable chemicals to be further used in the petrochemical industry for a polymeric carbon circular economy. This work’s aim was to identify chemical correlations between the thermal-cracking products and the feedstock polymer composition when using highly blended waste streams. The challenges addressed were to: (i) access a pool of experimental data on the monomer recovery potential of real-life, highly blended waste streams; (ii) estimate the polymer constituents of the mixed waste streams; and (iii) formulate a generic and systematic method to identify correlations between feedstock constituents and cracking products. Different post-consumer waste streams were investigated, including cardboard, automotive shredder residues, cable stripping waste, and textile waste. The cracking experiments were performed in a 2–4MWth industrial-scale Dual Fluidized Bed system at 800 °C using steam as fluidization agent. The polymeric constituents of the feedstocks were estimated using a numerical convex optimization method. To identify correlations between the feedstocks and products, a carbon bond-based classification was introduced. The experimental monomer yield ranged from 0.08 kg/kgf to 0.3 kg/kgf (f = feedstock) for the evaluated materials, corresponding to a carbon feedstock conversion rate between 14 % and 44 %. High yields of valuable monomers were obtained for the materials with the highest polyolefin content. The olefin monomer production correlated positively to the amount of aliphatic carbon in the original material and negatively to the carbon contents of the aromatic rings. From the trends observed, it was concluded that a framework based on carbon bond types is a promising approach to identify such correlations, which could serve as predictive tools for monomer recovery based on material’s composition and overall process conditions.
More Papers Like This
Challenges and opportunities of light olefin production via thermal and catalytic pyrolysis of end-of-life polyolefins: Towards full recyclability
AI summary Read the abstract
This review evaluates thermal and catalytic pyrolysis as pathways for converting end-of-life polyolefins back into valuable light olefins, finding that catalytic pyrolysis can achieve up to 85 wt% olefin yields under ideal lab conditions but faces challenges in catalyst stability, coke formation, and mixed-waste feedstocks. The authors outline reactor designs and research priorities needed to make industrial-scale chemical recycling of plastic waste viable.
Thermo-chemical recycling of plastics as a sustainable approach to the plastic waste issue
AI summary Read the abstract
This paper reviews thermo-chemical recycling as a promising solution for plastic waste, covering pyrolysis, gasification, and related processes that convert plastic into fuels and chemicals. The authors discuss challenges around removing harmful additives, energy consumption, and the need to design polymers with built-in recyclability.
Thermal and catalytic pyrolysis of a real mixture of post-consumer plastic waste: An analysis of the gasoline-range product
AI summary Read the abstract
Researchers performed thermal and catalytic pyrolysis on real post-consumer plastic waste mixtures using various catalysts, finding that polymer type strongly influenced gas, liquid, and char yields, and that zeolite catalysts produced gasoline-range hydrocarbon liquids with commercially viable compositions from mixed plastic feedstocks.
Retrieving back plastic wastes for conversion to value added petrochemicals: opportunities, challenges and outlooks
AI summary Read the abstract
"This review evaluates thermochemical, catalytic, and chemolysis technologies for converting recovered plastic waste into value-added petrochemicals such as hydrogen, synthesis gas, and bio-crude oil, assessing their commercial feasibility and environmental sustainability. Researchers identify key opportunities and challenges in plastic-to-fuel conversion while recommending future research directions to improve process efficiency and reduce costs."
Unlocking circular economy potential: Evaluating high-value chemical production from pyrolysis of plastics recovered from landfilled municipal solid waste
AI summary Read the abstract
This study used pyrolysis-GC/MS to analyze plastics recovered from municipal solid waste landfills, finding that pyrolysis at 500–650°C yields high proportions of naphtha-range hydrocarbons and aromatic compounds that could serve as valuable chemical feedstocks, supporting circular economy recovery from excavated landfill plastic.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.